We are having problems with out hygrothermograph. We are having to change the inks every 4 to 6 weeks and it is getting expensive. The inks are bleeding into the paper and rendering the grpah data totally usless because the lines are too thick to tell anything. We have changed to different brands of pens but that hasn't helped. So, now i'm looking for a less absorbent paper, I guess. The American papers work really well. Unfortunately, we need Celcius measure and I am having trouble finding a supplier. I was wondering if anyone had had similar problems and could suggest a solution. Or, if anyone could provide the brand names and suppliers information for good hygrothermograph support supplies (paper, inks etc.) Any advice would be very welcome. Also, thank-you to everyone who answered my call for help as to how to post this message. Julia Loten [log in to unmask]